HistoryEventHandler (Camunda Platform Javadocs 7.17.16-ee)

All Known Implementing Classes:

CompositeDbHistoryEventHandler, CompositeHistoryEventHandler, DbHistoryEventHandler, PublishHistoryEventHandler
```
public interface HistoryEventHandler
```
The interface for implementing an history event handler.

The HistoryEventHandler is responsible for consuming the event. Many different implementations of this interface can be imagined. Some implementations might persist the event to a database, others might persist the event to a message queue and handle it asynchronously.

The default implementation of this interface is DbHistoryEventHandler which persists events to a database.

Author:

Daniel Meyer

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`handleEvent(HistoryEvent historyEvent)`	Called by the process engine when an history event is fired.
`void`	`handleEvents(java.util.List<HistoryEvent> historyEvents)`	Called by the process engine when an history event is fired.

- Method Detail
  - handleEvent
```
void handleEvent(HistoryEvent historyEvent)
```
    Called by the process engine when an history event is fired.
    
    Parameters:
    
    historyEvent - the HistoryEvent that is about to be fired.
  - handleEvents
```
void handleEvents(java.util.List<HistoryEvent> historyEvents)
```
    Called by the process engine when an history event is fired.
    
    Parameters:
    
    historyEvents - the HistoryEvent that is about to be fired.